Quran 2:171 — The Heifer (Al-Baqarah)

The example of such disbelievers is that of parrots who repeat what they hear of sounds and calls, without understanding. Deaf, dumb, and blind; they cannot understand.

[2:170] When they are told, "Follow what GOD has revealed herein," they say, "We follow only what we found our parents doing." What if their parents did not understand, and were not guided?

[2:172] O you who believe, eat from the good things we provided for you, and be thankful to GOD, if you do worship Him alone.